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  1. U

    fluorescence under 532nm

    I know I am very late to this discussion but I ran across this phenomenon a while back. I knew that longer wavelength than uv could produce fluorescence but was quite surprised at how easily it could be seen. As pointed out many objects exhibit green light fluorescence but most are man made...
  2. U

    SSY 1's Recently?

    Interesting. Good work, I hadn't thought of that.
  3. U

    SSY 1's Recently?

    Thanx Mike appreciate the update. Still have not gotten round to working on mine, still working on chipmunk damage.
  4. U

    SSY 1's Recently?

    Hemlock Mike, You asked if anyone could translate the label on the side of the sissy2 pfn. Well it is roughly Caution High Tension. Remember Hebrew reads from right to left and uses no vowels. I've got the words in reverse order and cannot make them come out right but you can copy the...
  5. U

    Laser Induced Breakdown Spectroscopy

    Anyone interested in simple elemental analysis of materials might want to look at this: https://www.youtube.com/watch?v=ZzBSCrS8FAY More detailed info can be found here: http:\\spawnlinux.dyndns.org/DoCz/down_m/temp/ulao/LibsSystem I_Pics-.doc This site is not selling anything only providing...
  6. U

    SSY 1's Recently?

    I just posted a video about my home built LIBS system on YouTube it's at: https://www.youtube.com/watch?v=ZzBSCrS8FAY
  7. U

    SSY 1's Recently?

    Here's a nice pic from my archives of a SSY1 breakin air.
  8. U

    SSY 1's Recently?

    Mike. I like your device, especially that it reads with .1 f precision. that's more like .055 C. If you are ablating try defocusing to cover a larger area. Remember that you are dealing with differential measurements here so a lot of considerations for absolute measurements don't affect your...
  9. U

    SSY 1's Recently?

    Thanks for this info Mike. That makes it easier to find as it is not on Sam's site. Maybe we can get the info to Sam & he'll post it.
  10. U

    SSY 1's Recently?

    Mike I just received a SSY2 today and I will be trying to fire it up but since you've been there perhaps you will offer some guidance. First I've pasted pictures of the laser & the cap assy here with the leads labeled. Would you indicate what is the function of each set of leads? (My Hebrew is...
  11. U

    SSY 1's Recently?

    I don't know anything about it either but I am gona try to talk to one of these mfr.s about the subject. This site has quite a bit of info: Encyclopedia of Laser Physics and Technology - chromium-doped gain media, Cr:YAG, forsterite, alexandrite, Cr:LiSAF, Cr:LiCAF, Cr:LiSGAF, ZnSe, ZnS...
  12. U

    SSY 1's Recently?

    The q-switch in my sissy-1 looks like a solid crystal. If it is in fact a dye filled chamber then the outside walls are no more than a couple thousandths of an inch thick which would make it very fragile. Chad at MI tells me he routinely removes them by using a punch and tapping on them. I...
  13. U

    I'm at : 229 Shepherds Bluff Dr. Mooresville NC 28115 Thanx. We can rework that equation and...

    I'm at : 229 Shepherds Bluff Dr. Mooresville NC 28115 Thanx. We can rework that equation and solve for specific power ranges. No?
  14. U

    SSY 1's Recently?

    "I had read somewhere that the q-switch on the SSY-1 is fragile and can't handle being over driven.. I will have to find where I've read that." That seems to be the consensus. I'd like to know more about that.
  15. U

    SSY 1's Recently?

    Let me know how this works. My method was based on the idea that the laser pretty much covers the entire disk and thus deposits the energy evenly on the disk. since the mass of the disk is known and the specific heat and absorption (>98% at 1064 nm) are also known the energy can be calculated...
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    SSY 1's Recently?

    This is the set of cheap lenses I've been using for my LIBS system I have used various ones from the set over the last year and have had no problems with them. 5 Piece Loupe Set The set is 5 lenses, various focal lengths and cheap. I've seen them on sale for $1.99. I bought 3 sets, use them...
  17. U

    SSY 1's Recently?

    Ok I presume "private messages" where's that?
  18. U

    SSY 1's Recently?

    Keep in mind that even at 50 mg there is some time lag. I found that after 10 shots in 10 sec. that the reading didn't max till 12 or 13 sec. so it looks like the time lag is probably at least 2 or 3 sec. Of course I was using a thermocouple your experience may vary.
  19. U

    SSY 1's Recently?

    Sounds good to me Mike. Keep the disk small enough (mass) to keep the # of shots needed down.




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